Tai Chi.
Every morning Beihai Park is filled in with dozens of Chinese people performing various forms of traditional gymnastics and playing traditional music. That brings life in the thousand years old imperial garden and is probably its main feature.
This photo has won the first prize in People in the Garden category at the International Garden Photographer of the Year contest. http://www.igpoty.com/competition03/winners_PeopleGarden_First.asp?parent=winners,